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ID 19498
file
creator
PHENIX Collaboration
Hachiya, Takashi
Kohara, Ryota
Nakamura, Tomoaki
Tsuchimoto, Yuji
subject
deuteron-nucleus reactions
proton-proton interactions
nuclei with mass number 190 to 219
elementary particle jets
nuclear fragmentation
nuclear matter
abstract
Dihadron correlations at high transverse momentum pT in d+Au collisions at √sNN=200 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider. From these correlations, we extract several structural characteristics of jets: the root-mean-squared transverse momentum of fragmenting hadrons with respect to the jet √〈jT2〉, the mean sine-squared of the azimuthal angle between the jet axes 〈sin2 φjj〉, and the number of particles produced within the dijet that are associated with a high-pT particle (dN/dxE distributions). We observe that the fragmentation characteristics of jets in d+Au collisions are very similar to those in p+p collisions and that there is little dependence on the centrality of the d+Au collision. This is consistent with the nuclear medium having little influence on the fragmentation process. Furthermore, there is no statistically significant increase in the value of 〈sin2 φjj〉 from p+p to d+Au collisions. This constrains the effect of multiple scattering that partons undergo in the cold nuclear medium before and after a hard collision.
journal title
Physical Review C - Nuclear Physics
volume
Volume 73
issue
Issue 5
start page
054903-1
end page
054903-27
date of issued
2006-05-10
publisher
American Physical Society
issn
0556-2813
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Science